Fix Crash Due to Incorrect Optimization of EqualityComparer<T>.Default on Generic Record Type

[scott-ferguson-unity]

This is a backport of mono@ef848cf, which is it self a backport of dotnet/runtime#59861

This addresses fixes dotnet/runtime#72181.

The root issue is that the devitalization of EqualityComparer<T>.Default may generate an instance with open generic types still it in. This causes a virtual method resolution lookup in method-to-ir.c to fail and trigger an assert. The upstream fix will disable the devitalization and do a normal virtual call in this case.

• Should this pull request have release notes?
  • Yes
  • No
• Do these changes need to be back ported?
  • Yes
  • No
• Do these changes need to be upstreamed to mono/mono or dotnet/runtime repositories?
  • Yes
  • No

Reviewers: please consider these questions as well! ❤️

Release notes

Fixed UUM-99151 @scott-ferguson-unity
Mono: Fixed crash on incorrectly optimized calls to EqualityComparer.Default in Generic Record Type Equals implementations

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